Lag in Blender 2.83 Modeling (Edit Mode)
Which OS are you using ? Try Reinstalling Blender, i am also getting a lot of Problems in Blender 2.83.1, it must be optimised.
I recently switched to Linux, and when I start Blender, view port runs at 5 fps, while previous versions ran extremely smooth, i shutdown my PC (not restart) and retry after 10 minutes and start blender just when the PC boot, and it ran perfectly fine.